Spark-arrester.



s. E. PHEISTER.

SPARK ARRESTER.

APPLIQATION TILED 00116, 1913- 1,093,469. Patented Apr. 14, 1914.

2 SHEETS SHEET 1.

INVENTOR ATTORNEYS COLUMBIA PLANOGRAPHY CO.,WASHINGTON, D c.

S. E. PHEISTER.

SPARK ARBESTEB. APPLICATION FILED 00116, 1913.

1,093,469, Patented Apr. 14, 1914.

2 SHEETS-SHEET 2.

WITNESSES INVENTOI? muuunm ATTORNEYS @LUKBJA "ml 60-. IAIHW, D. C.

SAMUEL ELSWORTH PHEISTEB, 0F YAGOLT, WASHINGTON.

SPABK-ARRESTER.

Specification of Letters Patent.

Patented Apr. 1 1 i, 19'1ei.

Application filed October 16, 1913. Serial No. 795,452.

To all whom it may concern Be it known that I, SAMUEL E. PHEISTER, a citizen of the United States, and a resident of Yacolt, in the county of Clarke and State of Washington, have invented a new and Improved Spark-Arrester, of which the following is a full, clear, and exact description.-

My invention relates to a spark arrester to be applied to the Smokestack of locomotives, stationary boilers, and donkey engines and other similar engines, and arranged to permit of. the free escape of the smoke, while arresting the cinders, sparks, etc.

It is a design of my invention to provide an improved device of the character indicated, having increased efliciency.

The invention will be particularly eX- plained in the specific description following.

Reference is to be had to the accompanying drawings forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure 1 is a vertical section of a spark arrester constructed in accordance with my invention: Fig. 2 is a broken plan view of the removable cover, showing portions of the outer screen and appurtenances thereof; Fig. 3 is a sectional plan view on the line 3-3 of Fig. 1; and Fig. 4 is a side elevation of the removable cover and certain interior screen elements.

In constructing a practical embodiment of my invention in accordance with the illustrated form, a base is provided essentially in the form of a neck lOadapted to be placed over a smokestack, and to be secured, in practicefto the smokestack in any suitable manner, to form a continuation thereof and constitute an inlet to the spark arrester for conducting the smoke, sparks, etc., carried thereby to the interior of the arrester. r

Supported on the base 10 is an outer tubular screen 11, here shown as connected with the base by a flaring exterior wall 12 hereinafter more particularly referred to. The outer screen 11 may be strengthened by upright strips 13 suitably secured thereto, and to the upper edge of the wall 12. At the upper edge of the screen the strips 13 are bent inwardly, as at 14, and bolted to the bent ends is an edge-bent ring 15, on

which seats a removable cover 16, which is imperforate and constitutes a closure of the upper end of the arrester.

Suspended from the cover 16 is an interior tubular screen 17, here shown as secured to hangers 18 that depend from the under side of the cover and are suitably secured to the latter; On the cover also, and depending'therefrom, is a downwardly imperforate cone 19, coaxial with the inlet neck 10. The inner tubular screen is open at the top and bottom, and is approximately coaxial with the inlet neck 10, and is of greater diameter than said neck. The lower end of the said inner screen 17 furthermore is spaced from the neck, and the upper end of said screen is spaced from the cover and from the inverted cone 19, thereby leaving a free passage over the top of the inner screen.

In the space between the outer screen 11 and the inner screen 17, an intermediate tubular bafiie screen 20 is provided, here shown as depending from the under side of the cover 16, and like the screen 17 and cone 19, is carried by the cover. The connection between the intermediate screen 20 and the cover may be effected in any suitable manner, as for instance, by turning downward the ends of the hangers 18, as at 21, and securing the said intermediate screen thereto by rivets 21 or equivalent means. The intermediate screen 20 is spaced from the inner and outer screens and terminates at its lower end below the top of the inner screen. To protect the upper end of the intermediate screen, I provide a shield in the form of a ring or annular plate 22 at the inside of the screen, the shield in the present instance being shown as secured by the rivets 21 that secure the said intermediate screen. The cover 16 and the elements carried thereby, including the inner and the intermediate screens, and the cone, may be removed when desired, by lifting the said cover by means of suitable handles 28.

With the described construction the smoke and particles of cinders and sparks carried thereby will be discharged through the inlet neck 10 into the inner tubular screen 17, and by reason of the free space below the lower edge of said screen, air will be freely drawn into the screen with the smoke and will serve'to cool the gases, sparks, etc. The

products discharged into the inner screen will be deflected in all directions by the impert'orate cone 19, and pass outwardly over the upper edge of the inner screen in the direction of the intermediate screen. The impact of the sparks and cinders will be received by the fender 22 and will be prevented by the same from direct outward passage through the said intermediate screen. The smoke is free to find an outlet through the several screens, while the intermediate screen will cause the solid particles to pass in a downward direction between the inner screen 17 and the interme diate screen 20, and downward through the space between the inner and outer screens. The solid particles, including the sparks, will be received in an annular trough 24, which is formed on the outside of the base at the lower end of the outer screen 11, the trough having free communication vertically at the top with the space within the said outer screen. The flaring wall 12 constitutes the outer wall of the trough, while the inner wall thereof consists of the upper end 25 of the inlet neck 10. The outer wall 12 is provided with suitable outlets 26 for the discharge of the cinders as they collect in the trough. Above the outlets 26, shields 27 are provided to prevent the direct dropping of the sparks downwardly through the said outlets. The shields 27 may consist of integral flanges extending outwardly from the end 25 of the inlet neck 10.

To lift the arrester bodily, I provide handles 30 on the exterior of the outer screen 11, the rivets 31 or other securing means for the handles passing also through the strips 13.

By the above-described construction the screens aflord ample outlet for the smoke in all directions, and at the same time effectively arrest sparks, cinders, etc., and direct the same to a receiving trough. Furthermore, the circulation of air through the outer screen, and upwardly through the inner screen with the smoke, tends to repeatedly carry sparks and cinders upwardly to the inner screen and downwardly outside of the same, until they gradually gravitate to the trough, the ample exposure of the sparks to the cooling air serving to minimize the possibility of live sparks finding an outlet from the receiver at the bottom.

Having thus described my invention, I

claim as new and desire to secure by. Letters Patent:

1. A spark arrester, comprising a base having an inlet and adapted for support on a smokestack, an outer tubular screen supported on the base and of greater diameter than the inlet, a cover on the said screen, an imperforate, inverted cone suspended from the cover and having its apex in line with the inlet, the cover forming a closure between the cone and the outer screen, an inner tubular screen suspended from the cover, within and spaced from the outer screen, approximately co-axial with the inlet and of greater diameter than said inlet, said inner screen being open at the top and bottom, the lower end being above the inlet and the upper end spaced from the cover and cone, an intermediate tubular element between the'inner and outer screens and spaced from both, suspended from the cover and extending from the'under side thereof terminating below the top of the inner screen, there being an annular imperforate shield at the upper end of the intermediateelement, the lower portion of said element being in the form of a screen, and an annular spark. receiver on the base receiver being in communication at the top with the interior of the outer screen,

2. A spark arrester, comprising a base having an inlet, an outer tubular screen supported on the base, an inner tubular screen supported within the outer screen and spaced therefrom, adeflector in the form of an inverted cone extending into the topof the inner screen, said inner screen being spaced from the cone and terminating below the top of the outer screen, there bemg a closure between the base of the cone' and the outer screen, and a depending annu-' lar element extending downwardly from said closure into the space between the inner and outer screens, the said element comprising an imperforate upper portion and a lower portion in the form of a screen.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

SAMUEL ELSWORTH PHEISTER.

Witnesses O. JoRonN OLsoN, P. P. NnLsoN.

M Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. O.

the intermediate element being outside of the inlet, said spark V 

